“Justin Upton has a 90 percent chance of being with the Diamondbacks when spring training starts as things stand now, one Diamondbacks person estimated,” writes Jon Heyman of CBS Sports.

Heyman says while the Diamondbacks will continue to listen to offers for Upton, Diamondbacks owner Ken Kendrick believes Upton will remain with Arizona this winter.

Multiple reports this off-season suggested Arizona is seeking a young shortstop, plus pitching, in a deal for Upton.

More on Justin Upton...

Contract: Upton will earn $9.75 million next season, during which Niese will earn $3 million. Upton’s salary bumps up to $14.25 million in 2014 and $14.5 million in 2015, after which he is eligible to be a free agent.

Stats: Upton hit .280 with a .355 OBP and .430 SLG with 17 home runs and 67 RBI and 121 strikeouts in 554 at-bats in 2012.

Reports:

Nov. 8: The Diamondbacks are interested in acquiring a shortstop for Upton, according to Jon Heyman of CBS Sports.

Nov. 8: Jon Heyman of CBS Sports said Heyman reports that, while the Rangers are interested in acquiring Justin Upton, they are unwilling to include either Elvis Andrus or Jurickson Profar, making a deal with Texas unlikely.

Nov. 8: The New York Post’s Joel Sherman told WFAN last week he has yet to hear the Mets or Yankees involved in talks with Arizona about OF Justin Upton, who he believes will cost your team three or four players.Nov. 8: FOXSports.com’s Ken Rosenthal said the D-Backs are engaged in active discussions about trading Justin Upton, according to major league sources.

Nov. 5: “D-Backs GM Kevin Towers is intrigued by the thought of moving Upton and getting a mother lode of talent in return,” according to ESPN’s Jerry Crasnick.